Piston-rod packing.



I No. 785,152. PATEN'IZBD MAR. 21, 1905.

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PISTON PA er.

up IIIIIIIIIIIIIIII .1-4. 1904.

NITED STATES Patented March 21, 1905.

WALTER P. CHRYSLER, OF TRINIDAD, COLORADO.

PISTON-ROD PACKING.

SPECIFICATION forming part of Letters Patent N 0. 785,152, dated March21, 1905.

- Application filed April 14, 1904. Serial No. 206,149.

To all 1072/0111, it may concern:

Be it known that I, WV LTER P. CHRYSLER, a citizen of the United States,residing at Trinidad, in the county of Las Animas and State of Colorado,haveinvented new and useful Improvements in Piston-Rod Packing, of whichthe following is a specification.

My invention relates to improvements in piston-rod packing. and pertainsto that class of packing in which the pressure from the engine-cylinderis utilized for the purpose of pressing suitable packing-rings tightlyagainst the piston-rod to-make a steam-joint when the engine is runningunder steam-pressure, but in which the pressure upon the packing-ringswill be relieved when the steam is cut off from the cylinder and theengine is drifting, the construction being simple, cheap, and effectiveand readily applied to the stuffing-boxes now in use in connection withlocomotives and other steam-engines.

In the accompanying drawings, Figure 1 is a sectional View of astuffing-box for enginecylinders,showing my invention applied thereto.Fig. 2 is a section on line 2 2, Fig. 1. Fig. 3 is a section on line 33, Fig. 1. Fig. 4 is a section on line 4 4, Fig. 1. Fig. 5 is aperspective view of the several parts comprising my improvement.

My invention is more especially constructed for use in connection withthe stufiing-boxes of locomotive-cylinders, and in which it is wellknown that owing to the wear of the guide the piston-rod becomessomewhat out of line with the cylinder, which necessitatesa certainamount of lateral movement on the part of the packing devices in orderto prevent a binding result, which would be very objectionable, as iswell understood by those skilled in the art.

Referring now to the drawings, 1 indicates the usual stufiing-box,having the usual stuffing-box chamber through which the'pistonrod 3passes.

My invention pertains to the particular form of devices which I will nowdescribe, and in which 4 is a stuffing-box bushing. This bushing has alongitudinal flange 5, which fits tightly or snugly within thestuffing-box passage-way and has a longitudinal opening 6, which islarger in cross-section than the piston-rod 3, as clearly shown inFig. 1. The outer end of the flange 5 of this bushingl: is provided withlaterally extending steam passage ways 7, which communicate with thepassage-way 2 and through which steam from the stuflingbox passage-way2can freely pass. A coneshaped washer 25 abuts against the inner end ofthe bushing 1 with its cone-shaped portion in engagement with the saidbushing. Placed within the stufling-box lie 2. suitable, preferablycup-shaped, casing 8, and this casing is, in effect, a packing-ringretainer. This packing-ring retainer has formed in its longitudinal walla suitable number of steam-passageways 12, communicating with theinterior thereof, and its outer end is preferably formed with aninwardly -extending flange portion 14. As illustrated in Fig. 1, thisretainingring 8 fits snugly between the said cone-shaped washer 25 and asecond similar washer 26 and sufiiciently snug to make a steam-tightjoint, but permitting the lateral movement of the said retainer for apurpose to be presently explained.

Located within the retainer-ring 8 is one or more packing-rings 16, andthese packingrings 16 are formed of any desired number of sections,asshown in Fig.4, which have straight overlapping portions, as shown at17, to form a steam-tight joint and yet permit the packing-rings to becontracted sufliciently to make a steam-tight joint between them and thepiston-rod 3.

The operation of my invention is that steam passes from theengine-cylinder through the bushing passage-ways 7 to thestufling-chamher. The steam then passes through the openings orpassage-ways 12 of the retainer-ring 8 and causes a pressure upon thepackingrings 16, which compresses or contracts the rings tightly aroundthe piston-rod 3, making a steam-tight joint as long as the engine isworking under steam-pressure. As soon, however, as the steam-pressure iscut off from the engine-cylinder and the engine is drifting then thepressure upon the packing-rings is relieved, and the damage to themunder these circumstances is thus prevented.

From the foregoing description it Will be observed that When thepiston-rod 3 becomes outof line with the engine-cylinder on account ofthe Wearing of the guide and other parts the retainer in Which thepacking-rings are located and also the packing-rings can readily vibratelaterally to follow in the consequent lateral movement of thepiston-rod, and thus prevent binding and unnecessary Wear of the partsand also insuring a steam-tight joint between the packing-rings and thepiston-rod.

The foregoing construction enables me to form the casing 8 of asuflicient size to accommodate large piston packing-rings and theircooperating parts, thus making them long-lived and more effective andalso in providing suflicient space for the lateral movement of the partshereinbefore referred to. The arrangement is simple and cheap, easilyapplied, and effective in result.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is-

1. A steampressure-actuated piston-rod packing, comprising astufiing-box casing, a transversely-movable packing-ring retainertherein and transversely-contraeting packingrings in said retainer.

2. A steam-pressure-actuated piston-rod packing, comprising astufling-box casing, a transversely-movable packing-ring retainertherein and having steam passage-Ways extending through its peripheryand transversely-contracting packing-rings in said retainer.

3. A steam-pressure-actuated piston-rod packing, comprising astufiing-box casing, a transversely-movable packing-ring retainertherein and having steam passage-Ways extending through its periphery,transverselycontracting packing-rings in said retainer, and acone-shaped member bearing against the stufiing-box casing and having aflat face bearing against the packing-ring retainer.

4. A steam-pressure-actuated piston-rod packing, comprising astuffing-box casing, a transversely-movable packing-ring retainertherein, transversely contracting packingrings Within said retainer, andcone-shaped members bearing against the ends of said casing and havingstraight flat faces bearing against the ends of said packing-ringretainer.

5. A steampressure-actuated piston-rod packing, comprising astufling-box casing, a transversely-movable packing-ring retainertherein, transverselycontracting packingrings Within said retainer, abushing Within the inner end of said stufling-box casing, and havingsteam passage-Ways therein, and cone-shaped members bearing against saidbushing and-the end of the stuffing-box casing and having straight facesbearing against the ends of the packing-ring retainer.

6. A steam-pressure-actuated paeking,comprising a stufling-box casing, apacking-ring retainer therein, and contracting packingrings Within saidretainer.

7 A steam pressure actuated piston-rod packing, comprising astuffing-box easing, a transversely-movable packing-ring retainertherein and packing-rings in said retainer.

8. A steam-pressure-actuated piston-rod packing, comprising astuffing-box casing, 21. transversely-movable packing-ring retainertherein, steam compressed packing rings Within said retainer, andaeone-shaped member bearing against the stufiing-box casing and having aflat face bearing against the packingring retainer.

9. A steam-pressure-actuated piston-rod packing, comprising astuffing-box casing, a transversely-movable packing-ring retainertherein, packing-rings Within said retainer, a bushing within the innerend of said stuflingbox casing and having steam passage-Ways therein,and cone-shaped members at each end of the retainer and having flatfaces bearing against the same and the cone faces of the same bearingrespectively against the bushing and stuffing-box casin 10. Asteam-pressure piston-rod packing, comprising a stufiingbox casing, atransversely-movable packing-ring retainer therein, packing-rings Withinsaid retainer, and a cone-shaped member bearing against the stuffing-boxcasing and having a fiat face bearing against the packing-ring retainer.

11. A steam-pressure piston-rod packing, comprising a stuffing-boxcasing, a transversely-movable packing-ring retainer therein,packing-rings within said retainer, a bushing Within the casing, andcone-shaped members on each side of the retainer, and having cone-shapedouter faces bearing against the bushing and the casing.

12. A steam-pressure-actuated piston-rod packing, comprising astufiing-box casing, a transversely-movable packing-ring retainer,therein and having steam passage-Ways in its outer periphery,steam-compressed packingrings Within said retainer, a bushing Within theinner end of said stufling-box casing and having steam passage-Waystherein, and coneshaped members at each end of the retainer and havingflat faces bearing against the same and the cone-shaped faces of thesame bearing respectively against the bushing and stuffingbox.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing Witnesses.

IVALTER P. CHRYSLER.

WVitn esses:

LINCOLN H. HALL, B. F. SPRINGER.

